CN106346198A - Machining method for improving surface integrity of sealing labyrinth of rotating part - Google Patents

Machining method for improving surface integrity of sealing labyrinth of rotating part Download PDF

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Publication number
CN106346198A
CN106346198A CN201610766879.XA CN201610766879A CN106346198A CN 106346198 A CN106346198 A CN 106346198A CN 201610766879 A CN201610766879 A CN 201610766879A CN 106346198 A CN106346198 A CN 106346198A
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China
Prior art keywords
comb tooth
obturaging
processing
tooth
tumbler
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CN201610766879.XA
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Chinese (zh)
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CN106346198B (en
Inventor
孙玉洁
任海鹏
穆涛
李瑶
谢荣瑶
张迪
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中航动力股份有限公司
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Priority to CN201610766879.XA priority Critical patent/CN106346198B/en
Publication of CN106346198A publication Critical patent/CN106346198A/en
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Publication of CN106346198B publication Critical patent/CN106346198B/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23POTHER WORKING OF METAL; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass

Abstract

The invention discloses a machining method for improving surface integrity of a sealing labyrinth of a rotating part. The machining method includes the steps of firstly, placing a sealing labyrinth workpiece on a machining platform, and enabling a machine tool to select a sealing labyrinth cutter which is provided with a cooling device connected with a machining tool cooling system; secondly, selecting a main axis rotating speed, the feeding number and the feeding quantity according to a structure and a material of the sealing labyrinth, and cleaning and cooling the cutter and the workpiece by the cooling device during machining; thirdly, obtaining the sealing labyrinth after machining in the step 2; fourthly, burring and polishing tooth tops of the sealing labyrinth so as to obtain a sealing labyrinth finished product; fifthly, subjecting the sealing labyrinth to macroscopic assessment so as to obtain the qualified sealing labyrinth. The machining method for improving the surface integrity of the sealing labyrinth of the rotating part has the advantages that the surface integrity of the sealing labyrinth of an engine wheel disc is improved, cracking failure of the engine wheel disc is reduced and the engine performance is improved.

Description

A kind of tumbler that improves is obturaged the processing method of comb tooth surface integrity

Technical field

The invention belongs to machining technology field, it is related to a kind of tumbler that improves and obturages the processing of comb tooth surface integrity Method, the processing method that especially a kind of comb tooth of obturaging being applied to aero-engine tumbler improves surface integrity.

Background technology

The problem of crackle in turbine engine disk comb tooth of obturaging, occurs after a test run in factory or after line Cross multiple.The obturage material of comb tooth of turbine engine disk is the quantity of comb tooth on difficult-to-machine material, and turbine engine disk also not Equally.

Through multiple test inspection, and find in the metallographic examination to the turbine engine disk that crack fault occurs, There is microcosmic manufacturing deficiency in the surface of fault wheel disc, by further analysis of experiments, find the microcosmic on turbine engine disk surface Defect be lead to turbine engine disk obturage comb tooth because early fatigue lead to ftracture main cause.

Turbine engine disk is aero-engine tumbler, and comb tooth of obturaging is mainly used in preventing lubricating oil from engine bearing Intracavity spills, thus controlling cooling air and prevent the combustion gas of primary air from entering the turbine disk or compressor cavity it is ensured that compressor Or the performance of the turbine disk.Obturage comb toothing region for load area, and stress distribution is unbalanced, therefore any micro-variations all can Causing stress redistribution, produce micro-crack, micro-crack extension, causing fault, thus affecting engine performance or even accident.Institute So that comb tooth of obturaging on wheel disc processing ensures surface integrity requirement, particularly important.

Content of the invention

The processing method of comb tooth surface integrity it is an object of the invention to provide a kind of raising tumbler is obturaged, by carrying High turbine engine disk is obturaged the integrity of comb tooth surface, thus improving the integrity on the surface of turbine engine disk, decreasing and starting Wheel disk cracking fault, improves engine performance.

The purpose of the present invention is achieved through the following technical solutions:

This tumbler that improves is obturaged the processing method of comb tooth surface integrity, comprises the following steps: step 1, will obturage Comb tooth workpiece is placed on machine tooling platform, and lathe selects comb serrated knife tool of obturaging, and cutter has and lathe cooling system The chiller connecting;Step 2, according to the structure and material of comb tooth of obturaging select the main shaft rotating speed of lathe, feeding number of times and The amount of feeding, in the course of processing, chiller is carried out to cutter and workpiece and cools down;Step 3, processing through step 2 To comb tooth of obturaging;Step 4, is removed burr and polishing to the tooth tip portion of comb tooth of obturaging, and obtains comb tooth finished product of obturaging;Step Rapid 5, comb tooth finished product of obturaging is carried out with macroscopic view evaluation, obtains qualified comb tooth of obturaging.

Further, the feature of the present invention also resides in:

Wherein in step 2, the main shaft rotating speed of lathe is 24.3-35m/min, and the amount of feeding is 0.11-0.13mm/r, limits Final cutting depth is between 0.13-0.25mm.

Wherein in step 2, the course of processing is specifically: removes surplus processing mode using circulation, processes one in the middle part of tooth slot position Individual straight trough, gullet base leaves surplus a, and recirculation processing removes two angle faces of straight trough, and two angle faces also leave remaining Amount b;The main shaft rotating speed of lathe is 36-56m/min, and the amount of feeding is 0.1-0.15mm/r.

When chiller wherein in step 2 is high-pressure pump, the cooling pressure in the course of processing is 4-10bar.

When chiller wherein in step 2 is high pressure chiller, the cooling pressure in the course of processing is 15-30bar.

When comb serrated knife of wherein obturaging in the course of processing of step 2 tool wear of the tool flank bandwidth is more than 0.3mm, more renew Comb serrated knife of obturaging has.

The detailed process wherein going flash removed and polishing in step 4 is: is gone because of comb tooth of obturaging using little flat file hack-file Process the flanging burr causing, reuse 120# emery cloth and remove flash removed, the teeth portion of comb tooth of being obturaged using 240# emery cloth polishes afterwards, Finally clean comb tooth rim side of obturaging.

Wherein in step 5, the detailed process of macroscopic view evaluation is: checks that the surface of comb tooth finished product of obturaging must not have cut, obturages The chamfered edge of comb tooth finished product crown is less than 0.07mm, finally carries out sample cream inspection in comb tooth finished surface of obturaging.

The detailed process of wherein sample cream inspection is: after comb tooth finished surface impression compound of obturaging, sample cream solidification, it is carried out Section, the surface roughness inspection result of section and the metallographic structure inspection result contrast being processed comb tooth of obturaging contrast one During cause, obtain qualified comb tooth of obturaging.

When wherein contrasting inconsistent, carry out microcosmic evaluation, detailed process is: sample cream is cut into slices, then 200-500 again Again micro- lower observation analysis white, deformation layer, reprecipitation layer, fold, pull/peel off, the strain of crackle/tear and processing hardening Material surface microstructure changes.

The invention has the beneficial effects as follows: the problem that can be cracked in use based on turbine engine disk, through excessive Secondary test and the analysis to its construction features, and by sending out in the inspection of the metallographic structure to multiple engine failure wheel discs Existing, the cracking of turbine engine disk ftractureed due to comb tooth early fatigue of obturaging due to cause;The present invention is according to comb tooth of obturaging Structure and material select machine tool chief axis line rotating speed, the feeding number of times and amount of feeding, and during processing, cutter is carried out Cool down and comb tooth workpiece of obturaging is carried out, improve Tool in Cutting performance, improve the complete of comb tooth finished surface of obturaging Property, and comb tooth of obturaging is removed with burr and polishing, and comb tooth finished product of obturaging is carried out with macroscopic view evaluation, thus carrying The high integrity of comb tooth of obturaging, decreases the fault of turbine engine disk cracking, improves the performance of electromotor.

Further, obturage for gh901 material and the tc11 turbine disk structure of comb tooth, give different processing sides Method, and provide specific machined parameters and processing method.

Further, for the different chillers of Installing machine tool, there is provided suitable high-pressure pump or high pressure chiller Cooling pressure parameter.

Further, when comb serrated knife tool wear of the tool flank bandwidth of obturaging is more than 0.3mm, carry out cutter changing, protect Demonstrate,prove the elaboration of comb tooth processing of obturaging, improve the integrity of comb tooth of obturaging.

Further, there is provided the method that burr and polishing are removed to the tooth tip portion of comb tooth of obturaging, and Comb tooth finished product of obturaging is carried out with cleaning it is ensured that the integrity of the teeth portion of comb tooth of obturaging.

Further, there is provided the assessment method of surface integrity, and sample cream inspection is right with what metallographic structure checked Ratio, the strict inspection controlling comb tooth of obturaging, improves the integrity of its comb tooth of obturaging, and also has grasped part machine and add surface matter Amount and the relation of surface integrity.

Brief description

Fig. 1 is to process the gh901 material turbine disk using the method for the present invention to obturage the structural representation of comb tooth;

Fig. 2 is to process the tc11 material turbine disk using the method for the present invention to obturage the structural representation of comb tooth.

Specific embodiment

Below in conjunction with the accompanying drawings the present invention is described in further detail:

The processing method of comb tooth surface integrity the invention provides a kind of raising tumbler is obturaged, comprises the following steps:

Step 1, the obturage process equipment of comb tooth of turbine engine disk need to be selected to ensure the numerically controlled lathe of its range of work, Meanwhile, the coolant of this numerically controlled lathe can continuously spray;If this device configuration high-pressure pump, cooling pressure should ensure that 4- 10bar;If the cooling system of this device configuration has high pressure chiller, cooling pressure should ensure that 15-30bar;It is simultaneously Lift comb tooth surface integrity of obturaging, in the case that comb teeth size requirement is obturaged in guarantee, improve comb serrated knife tool of obturaging as far as possible Rigidity, the chiller being connected with lathe cooling system should be had on cutter simultaneously.

Step 2, the structure and material according to comb tooth of obturaging selects main shaft rotating speed, feeding number of times and the amount of feeding of lathe, The coolant that in the course of processing, chiller sprays can be transported at a high speed on cutter crown, quickly wash away in the course of processing and produce Iron filings, cutter is lowered the temperature simultaneously;The main shaft rotating speed of wherein processing gh901 material lathe is 24.3-35m/min, enters It is 0.11-0.13mm/r to amount, limiting final cutting depth is between 0.13-0.25mm;The main shaft of processing tc11 material lathe Line rotating speed is 36-56m/min, and the amount of feeding is 0.1-0.15mm/r

Step 3, obtains, through the processing of step 2, comb tooth of obturaging.

Step 4, removes the flanging burr causing because of comb tooth processing of obturaging using the little flat file hack-file in needle file;Using 120# The burr that emery cloth removal is obturaged in comb tooth teeth portion;Obturaged using No. 240 emery cloth polishes the crown of comb tooth;Clean comb tooth of obturaging, and Clean comb tooth teeth groove of obturaging with Cotton Gossypii and dry cloth.Visually inspect, using 3-10 times of magnifier, comb tooth rim edge roughness of obturaging simultaneously, Require ra1.6 μm;And by the sense of touch of human body, it is checked, that is, band glove touch comb tooth rim side of obturaging, and mainly seal The sharp side of tight comb tooth, is not allow for any dry and astringent state;Cotton Gossypii is put into and obturages in comb tooth teeth groove, along teeth groove direction mobile it is desirable to It is not allow for cotton-wool to rest at the crown of comb tooth of obturaging.

Step 5, carries out macroscopic view evaluation, specifically: using 3-10 times of magnifier, comb tooth enters to obturaging to comb tooth finished product of obturaging Row checks, the surface of comb tooth of obturaging must not have cut completely;The sharp side chamfered edge of comb tooth crown obturaged is not more than 0.07mm, does not allow Jagged, due to easily producing burr during machining, when therefore detecting, coroner need to carry glove to touch along comb tooth surface of obturaging Check, during touch, need feel smooth;It is cut into slices, under the microscope after comb tooth surface impression compound of obturaging, sample cream solidification Check size and the surface roughness of section, when the inspection conclusion of sample cream is consistent with the conclusion of metallographic structure inspection, this envelope Tight comb tooth is qualified product;Carry out micro examination when conclusion is inconsistent.

The detailed process of micro examination is: carries out overlay film to inspection area, after overlay film, mirco structure is observed, 200~500 Again micro- lower observe and analyze, analysis white, deformation layer, redeposited layer, fold, pull/peel off, crackle/tear strain and adding The material surface microstructure change such as work hardening.Thus in depth having grasped the pass that part machine adds surface quality and surface integrity System, is that machining control, accident analysis, research on standard provide important technological guidance.

As shown in figure 1, when comb tooth that the gh901 material turbine disk is obturaged is processed, labyrinth gas sealses turning is by its own Structural agent, processing is divided into 4 feedings, for the first time: 0.9mm, for the second time, for the third time: 0.7mm, and the 4th time: 0.2mm.Turning is sealed Tight comb tooth teeth groove machined parameters: main shaft rotating speed is 24.3~35m/min, preferably 27m/min, 30m/min or 32m/min; The amount of feeding is 0.11~0.13mm/r, preferably 0.12mm/r;Limit final cutting depth between 0.13~0.25mm, preferably For 0.15mm, 0.19mm or 0.22mm.

As shown in Fig. 2 when comb tooth that tc11 material fan wheel disc is obturaged is processed, the tooth depth of comb tooth of obturaging is 3.2mm, bottom of the tooth radius of corner is 0.9mm, and in order to ensure obturage comb teeth size and surface integrity, labyrinth gas sealses cutting is using following Ring removes surplus processing mode, is divided into Roughing and fine machining work step, and in Fig. 2, cyclic process goes out a straight trough first, and bottom of the tooth leaves surplus a For 0.3mm, recirculation processing two angle faces of removal, it is 0.3mm that two angle faces leave surplus b for polish, finally completes The polish of labyrinth gas sealses;In the course of processing, the main shaft rotating speed of lathe is 36-56m/min, preferably 38m/min, 45m/ Min, 53m/min or 50m/min;The amount of feeding is 0.1-0.15mm/r, preferably 0.12mm/r, 0.13mm/r or 0.14mm/r.

The processing method of the present invention is obturaged comb tooth surface integrity by lifting tumbler, establishes the processing of comb tooth of obturaging Technique preparation, technological parameter, procedure of processing, sharp side of obturaging are processed, surface integrity assessment method, have in depth grasped part machine Plus the relation of surface quality and surface integrity, it is that machining control, accident analysis, research on standard provide important technology and refer to Lead.Lift the processing method application in production and processing at the scene of surface integrity with wheel disc comb tooth of obturaging, wheel disc cracking Fault rate is decreased obviously after problem test run in factory or after line.

Claims (10)

1. a kind of improve tumbler obturage comb tooth surface integrity processing method it is characterised in that comprising the following steps:
Step 1, comb tooth workpiece of obturaging is placed on machine tooling platform, knife rest is installed comb serrated knife tool of obturaging, on cutter There is the chiller being connected with lathe cooling system;
Step 2, the structure and material according to comb tooth of obturaging selects main shaft rotating speed, feeding number of times and the amount of feeding of lathe, processing During chiller cutter and workpiece are carried out and cool down;
Step 3, obtains, through the processing of step 2, comb tooth of obturaging;
Step 4, is removed burr and polishing to the tooth tip portion of comb tooth of obturaging, and obtains comb tooth finished product of obturaging;
Step 5, carries out macroscopic view evaluation, obtains qualified comb tooth of obturaging to comb tooth finished product of obturaging.
2. according to claim 1 improve tumbler obturage comb tooth surface integrity processing method it is characterised in that institute The main shaft rotating speed stating lathe in step 2 is 24.3-35m/min, and the amount of feeding is 0.11-0.13mm/r, limits final cutting deep Between spending for 0.13-0.25mm.
3. according to claim 1 improve tumbler obturage comb tooth surface integrity processing method it is characterised in that institute State in step 2 course of processing specifically: surplus processing mode is gone using circulation, processes a straight trough, tooth in the middle part of tooth slot position Trench bottom leaves surplus a, and recirculation processing removes two angle faces of straight trough, and two angle faces also leave surplus b;Lathe Main shaft rotating speed is 36-56m/min, and the amount of feeding is 0.1-0.15mm/r.
4. according to claim 1 improve tumbler obturage comb tooth surface integrity processing method it is characterised in that institute When the chiller stated in step 2 is high-pressure pump, the cooling pressure in the course of processing is 4-10bar.
5. according to claim 1 improve tumbler obturage comb tooth surface integrity processing method it is characterised in that institute When the chiller stated in step 2 is high pressure chiller, the cooling pressure in the course of processing is 15-30bar.
6. according to claim 1 improve tumbler obturage comb tooth surface integrity processing method it is characterised in that institute When comb serrated knife of obturaging in the course of processing stating step 2 tool wear of the tool flank bandwidth is more than 0.3mm, the comb serrated knife of obturaging more renewing Tool.
7. according to claim 1 improve tumbler obturage comb tooth surface integrity processing method it is characterised in that institute State and in step 4, go the detailed process of flash removed and polishing to be: go to cause because of comb tooth processing of obturaging using little flat file hack-file Flanging burr, reuses 120# emery cloth and removes flash removed, the teeth portion of comb tooth of being obturaged using 240# emery cloth polishes afterwards, finally cleaning envelope Tight comb tooth rim side.
8. according to claim 1 improve tumbler obturage comb tooth surface integrity processing method it is characterised in that institute The detailed process stating macroscopic view evaluation in step 5 is: checks that the surface of comb tooth finished product of obturaging must not have cut, comb tooth finished product tooth of obturaging The chamfered edge of point is less than 0.07mm, finally carries out sample cream inspection in comb tooth finished surface of obturaging.
9. according to claim 8 improve tumbler obturage comb tooth surface integrity processing method it is characterised in that institute The detailed process stating sample cream inspection is: after comb tooth finished surface impression compound of obturaging, sample cream solidification, it is cut into slices, will cut into slices Surface roughness inspection result with process comb tooth of obturaging metallographic structure inspection result contrast, contrast consistent when, closed The comb tooth of obturaging of lattice.
10. according to claim 9 improve tumbler obturage comb tooth surface integrity processing method it is characterised in that Described contrast inconsistent when, carry out microcosmic evaluation, detailed process is: sample cream is cut into slices, then 200-500 times of micro- lower sight again Examine analysis white, deformation layer, reprecipitation layer, fold, pull/peel off, material surface that the strain of crackle/tear and processing are hardened micro- See tissue change.
CN201610766879.XA 2016-08-29 2016-08-29 A kind of processing method for improving rotating member and obturaging comb tooth surface integrality CN106346198B (en)

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Publication number Priority date Publication date Assignee Title
CN107598497A (en) * 2017-10-18 2018-01-19 无锡航亚盘件制造有限公司 The processing method that a kind of aero-engine obturages labyrinth
CN109356662A (en) * 2018-11-27 2019-02-19 中国航发沈阳黎明航空发动机有限责任公司 A kind of process of aero-engine Low Pressure Turbine Rotor assembly
CN109604726A (en) * 2019-01-09 2019-04-12 中国航发南方工业有限公司 The processing method of comb tooth socket and comb toothing
CN110434357A (en) * 2019-07-09 2019-11-12 中国航发哈尔滨东安发动机有限公司 High temperature alloy labyrinth gas seals class part by numerical control processing method

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CN103894626A (en) * 2014-04-10 2014-07-02 西安航空动力股份有限公司 Machining method for sealing teeth on sealing surface of outer ring of certain-type high-pressure turbine

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107598497A (en) * 2017-10-18 2018-01-19 无锡航亚盘件制造有限公司 The processing method that a kind of aero-engine obturages labyrinth
CN107598497B (en) * 2017-10-18 2019-06-14 无锡航亚盘件制造有限公司 A kind of processing method that aero-engine obturages labyrinth
CN109356662A (en) * 2018-11-27 2019-02-19 中国航发沈阳黎明航空发动机有限责任公司 A kind of process of aero-engine Low Pressure Turbine Rotor assembly
CN109604726A (en) * 2019-01-09 2019-04-12 中国航发南方工业有限公司 The processing method of comb tooth socket and comb toothing
CN110434357A (en) * 2019-07-09 2019-11-12 中国航发哈尔滨东安发动机有限公司 High temperature alloy labyrinth gas seals class part by numerical control processing method

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Address after: Weiyang Xu Jia Wan 710021 Shaanxi city of Xi'an Province

Patentee after: AECC AVIATION POWER CO., LTD.

Address before: Weiyang Xu Jia Wan 710021 Shaanxi city of Xi'an Province

Patentee before: AVIC AVIATION ENGINE CORPORATION PLC